Adjustable ladder extension



FIG. 1 is a perspective view of an adjustable ladder extension showing my new design;

FIG. 2 is a top view shown at an enlarged scale thereof;

FIG. 3 is a bottom view shown at an enlarged scale thereof;

FIG. 4 is front view shown at an enlarged scale thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is an enlarged view of a portion taken from FIG. 4. 

CLAIM The ornamental design for an adjustable ladder extension, as shown and described. 